The report aims to explain how these conclusions ______.
| A．were reached |
| B．had been reached |
| C．have reached |
| D．had reached |
The Olympic Games, _____ in 776 BC., didn’t include women players until 1912.
A. first played B. to be first played
C. first playing D. to be first playing
_____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
| A．Put | B．Putting | C．Having put | D．Being put |
Having been attacked by terrorists, _____.
| A．doctors cane to their rescue | B．the tall building collapsed |
| C．an emergency measure was taken | D．warnings were given to tourists |
The disc, digitally _____ in the studio, sounded fantastic at the party.
| A．recorded | B．recording |
| C．to be recorded | D．having recorded |
According to a recent U.S. survey, children spent up to 25 hours a week _____ TV.
| A．to watch | B．to watching | C．watching | D．watch |